[lkml]   [2001]   [Mar]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH for 2.5] preemptible kernel
On Wed, 21 Mar 2001, Keith Owens wrote:
> I misread the code, but the idea is still correct. Add a preemption
> depth counter to each cpu, when you schedule and the depth is zero then
> you know that the cpu is no longer holding any references to quiesced
> structures.

A task that has been preempted is on the run queue and can be
rescheduled on a different CPU, so I can't see how a per-CPU counter
would work. It seems to me that you would need a per run queue
counter, like the example I gave in a previous posting.

Nigel Gamble
Mountain View, CA, USA.

MontaVista Software

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:29    [W:0.144 / U:3.572 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site